Improved roofing composition



"UNITED STATES WM.'L. POTTER, OF CLIFTON PARK, NEW YORK.

IMPROVED ROOFING COMPOSITION.

Specification forming part of Lettcrs'Patent No. 46,495, dated February 21, 1865.

To all whom it may concern:

Be it known. that I, W1LLIAM L. POTTER, of Clifton Park, in the county of Saratoga and State of New York, have invented a new and Improved Composition for Roofing, Covering the Sides of Buildings, Boat-Decks, 850.; and I do hereby declare that the following is a full and exact description thereof.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and. application.

I take what is generally known as slaterock, and grind it to a fine powder in a grain or plaster mill, and mix it with any suitable glutinous water-proof materialsuch as coaltar, gas-tar, oil, paint, &c.in such quantities which may be applied to paper, canvas, &c., either before or after the paper, canvas, &c., have been tacked to the roof. When used for covcringthe sides of buildings, boat-decks,&c., the composition should be of the consistency of common paint, and may be applied with an 

